NXP Semiconductors MK22FN256CAP12R

Overview

MK22FN256CAP12R from NXP Semiconductors is a 120 MHz ARM® Cortex®-M4 based microcontroller with FPU, 256 KB flash, 128 KB RAM, and 52 GPIOs in an 80-pin WLCSP package. It integrates USB LS/FS OTG 2.0 with embedded 3.3 V/120 mA LDO, two 16-bit SAR ADCs (1.2 MS/s), and low-power operation down to 140 nA in VLLS0 mode. It targets space-constrained industrial sensor nodes requiring USB connectivity and deterministic real-time control.

For engineers reviewing the MK22FN256CAP12R datasheet, MK22FN256CAP12R pinout, MK22FN256CAP12R application, or MK22FN256CAP12R equivalent, this page delivers verified technical context, exact pin-level circuit roles, low-power timing behavior, USB crystal-less device operation, and validated alternative MCUs for K22F-family migration paths.

Technical Context

The MK22FN256CAP12R implements a dual-oscillator clock system with independent 32 kHz RTC and 3–32 MHz main crystal inputs, plus three internal oscillators (32 kHz, 4 MHz, 48 MHz) and a multi-purpose clock generator featuring both PLL and FLL. Its power architecture supports seven low-power modes-including VLLS0 (140 nA) and VLPS (8.7 µA)-with sub-6 µs wake-up from STOP/VLPS and full state retention.

It embeds a 16-channel DMA controller, dual 8-channel general-purpose/PWM timers with quadrature decode, and two 12-bit DACs. Analog subsystem includes two 16-bit SAR ADCs with 1.2 MS/s sampling in 12-bit mode, two analog comparators with integrated 6-bit DACs, and hardware CRC and true random-number generation for secure firmware updates.

Key Specifications

Pinout & Package

80-pin Wafer-Level Chip-Scale Package (WLCSP), 4.13 mm × 3.56 mm × 0.564 mm, 0.4 mm ball pitch. Ball grid layout follows JEDEC MO-255 standard with perimeter I/O and dedicated power/ground balls.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with MK22FN256CAP12R, MK22FN512CAP12R offers direct flash scalability without layout change, while MK64FX512VLQ12 adds Ethernet but requires PCB redesign and increases thermal footprint-making MK22FN256CAP12R optimal for size- and power-constrained USB sensor endpoints.

Availability

MK22FN256CAP12R is available at Aetrix Electronics and suitable for industrial sensor nodes, medical wearables, smart building controllers, and USB-enabled industrial gateways requiring stable component supply across long-lifecycle deployments.

Supply support for MK22FN256CAP12R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in ARM-based microcontrollers and edge processing.

The Kinetis K22F product line was designed specifically for space-constrained, cost-sensitive applications demanding low-power operation, USB 2.0 connectivity, and floating-point performance - targeting sensor fusion, portable diagnostics, and intelligent edge nodes.

FAQ

What is the maximum operating frequency and core type of the MK22FN256CAP12R?

The MK22FN256CAP12R features a 120 MHz ARM® Cortex®-M4 core with integrated floating-point unit (FPU). This enables deterministic real-time execution of DSP algorithms and IEEE-754 compliant floating-point operations without software emulation overhead. The core achieves 1.25 Dhrystone MIPS per MHz, delivering 150 DMIPS at full speed - confirmed in the K22P121M120SF7 Reference Manual Section 3.1.1.

Does the MK22FN256CAP12R support crystal-less USB Full-Speed device operation?

Yes, the MK22FN256CAP12R supports USB Full-Speed (12 Mbps) device mode without an external 12 MHz crystal. It uses an internal precision oscillator calibrated against the USB SOF packet, enabling reliable enumeration and data transfer in portable designs. This feature is documented in Section 3.8.1 of the K22P80M120SF7 Data Sheet Rev. 7 and verified in NXP Application Note AN4987.

What are the lowest power consumption modes supported by the MK22FN256CAP12R?

The MK22FN256CAP12R supports Very Low-Leakage Stop mode 0 (VLLS0) with typical current of 140 nA at 3.0 V and –40°C to 25°C ambient. In this mode, the POR detect circuit remains active, RTC continues timekeeping via VBAT or VDD, and full register/state retention is maintained. Wake-up latency is ≤140 µs - values confirmed in Table 6 of the K22P80M120SF7 Data Sheet Rev. 7.

How many analog-to-digital converters does the MK22FN256CAP12R integrate, and what are their key specs?

The MK22FN256CAP12R integrates two independent 16-bit SAR ADC modules. Each supports up to 1.2 million samples per second in 12-bit mode with programmable sample time, hardware averaging, and trigger sources including timers and external pins. Accuracy is specified to ±1.5 LSB INL and ±0.5 LSB DNL across –40°C to +85°C - detailed in Section 3.6.1 of the K22P80M120SF7 Data Sheet Rev. 7.

Is the MK22FN256CAP12R pin-compatible with other K22F family members?

Yes, the MK22FN256CAP12R shares identical 80-pin WLCSP mechanical and electrical pinout with MK22FN512CAP12R and MK22FN512CBP12R, as confirmed in Package Drawing 98ASA00710D. All three use the same ball map, power/ground assignment, and peripheral multiplexing - enabling drop-in flash-size upgrades without PCB revision.